title: Surface octahedral distortions and atomic design of perovskite interfaces.
abstract: Atomic engineering of perovskite films and interfaces is significantly improved by in situ optimization of reflection high-energy electron diffraction (RHEED) features resulting from surface BO₆ octahedral rotations seen during molecular-beam epitaxy growth. This approach yields Sr-doped manganite films across the phase diagram with magnetotransport properties that are, for the first time, identical to bulk single crystals. Careful structural analysis of manganite/titanate interfaces shows that cation intermixing and unit cell dilations are eliminated, while BO₆ rotations and Jahn-Teller-type elongations are nearly completely suppressed at the interface.
authors.affiliation: CNR-IOM TASC National Laboratory, Area Science Park-Basovizza, 34149 Trieste, Italy.
authors.forename: A Yu
authors.initials: AY
authors.lastname: Petrov
authors.forename: X
authors.initials: X
authors.lastname: Torrelles
authors.forename: A
authors.initials: A
authors.lastname: Verna
authors.forename: H
authors.initials: H
authors.lastname: Xu
authors.forename: A
authors.initials: A
authors.lastname: Cossaro
authors.forename: M
authors.initials: M
authors.lastname: Pedio
authors.forename: J
authors.initials: J
authors.lastname: Garcia-Barriocanal
authors.forename: G R
authors.initials: GR
authors.lastname: Castro
authors.forename: B A
authors.initials: BA
authors.lastname: Davidson
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D046911:Macromolecular Substances; D010087:Oxides; C059910:perovskite; D014025:Titanium
keywords: interface engineering; manganite; molecular-beam epitaxy; perovskite; surface diffraction